Elisa is a mother of two who lets her 9-year-old daughter Lucia go on an overnight playdate with her new best friend Josie. After meeting Josie's mother, Rebecca, Elisa is put at ease by her charming nature and the family's impressive house. But when Elisa says goodnight to her daughter, she has no idea that she is about to be thrust into every parent's worst nightmare.

When Elisa returns goes to pick up Lucia the next day, she discovers that the house was a holiday rental and Lucia is missing, and Rebecca and Josie have vanished.

As an urgent manhunt unfolds across Europe, Elisa and her husband find themselves the object of police and public scrutiny. Elisa's perfect family begins to unravel under the pressure, and long-buried secrets come to light.